Suction device for spinning machines



Jan. 15, 1963 E. JACOB] ETAI. 3,073,105

SUCTION DEVICE FOR SPINNING MACHINES 2 Sheets-Sheet 1 Filed March 4, 1960 'INVENTORS Mom-Q. 4

Ev FQQQ M the Y e=K 1963 E. JACOBI ETAL 3,073,105

SUCTION DEVICE FOR SPINNING MACHINES Filed March 4, 1960 2 Sheets-Sheet 2 I 4 F/g 01' IK Smacks;

el'mz Bu-K INVENTORS ilnited States Fat'ent The invention concerns textile machinery and relates to a suction device of particular, though not exclusive, application to ring spinning frames.

conventionally, suction tubes for drawing off broken ends from the front roller of the drafting arrangement of ring spinning frames are fixed in such a Way that the W ends of each tube are provided with attachment means working in conjunction with corresponding fixing devices rigidly secured to the machine. A so-called link-spring suspension or a pivoting arm system may be used for this purpose, but in these and other assemblies a common feature is that, at least, two supports are required. Thus, for each suction tube, two fixing devices or connections are always necessary.

Such fixing devices not only take up a relatively large amount of room, but possess the disadvantage, particularly when in use, that both the fixing devices have to be operated simultaneously, so that the operative has, of necessity, to hold the suction tube aligned roughly parallel to the front roller by hand, and must execute a parallel movement of the suction tube when pivoting it to and from the front roller. Any slight carelessness by the operative when using the suction tube may result in the non-alignment of the tube and front roller, the elfect of such non-alignment of the tube and front roller being a suction which is not uniform over the full extent of the tube.

It is among the objects of the present invention to provide means whereby the suction tube may be secured to fixed parts whether parts of the machine or components of the suction equipment, which will be economical of space but which will, in addition, ensure the true parallel alignment of the suction tube and the front roller in all positions of the one relative to the other and particularly in the extreme position adjacent the said roller.

According to the present invention, a suction device of particular, though not exclusive, application to ring spinning frames includes a suction tube and a rigid arm substantially transversely thereof adapted to apply a reduced pressure to said suction tube and so pivotally mounted in a fixed support as to be capable of motion in a given plane substantially transversely of the axis of said suction tube, the means for applying a reduced pressure to the suction tube being such that the seal between said means and a fixed part of the suction assembly remains effective throughout pivoted motion of the arms. Preferably according to the present invention, the suction device is adapted to allow of the location thereof in any one of a plurality of predetermined positions relative to a fixed axis parallel to the longitudinal axis of the suction tube.

More particularly, according to the present invention, the rigid arm itself forms a means whereby a reduced pressure may be applied to the suction tube, said arm being so connected to the fixed suction assembly as to remain in sealed connection therewith upon pivotal motion of the arm. g

A variant of the invention provides for such a hinged joint as to ensure that when the arm is pivoted, the suc- 2 its construction is simplified, as this arm new acts at the same time as a method of fixing in the form of a pivoting arm. As the joint provides freedom of movement only in one plane, the suction tube cannot deviate from parallism to the front roller in any position in which it is pivoted, except to a. very slight extent due to the play in the joint, which must be minimized; the construction of the tube itself is sufiiciently rigid to prevent substantial deviations.

The invention will be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a side elevation of one embodiment of the present invention;

FIG. 2 is a plan View along the arrow II in FIG. 1;

FIG. 3 is a side elevation of an alternative embodiment; and,

FIG. 4 is a plan view of the embodiment shown in FIG. 3.

Referring now to FIGS. 1 and 2 of the drawings, a suction tube 1, of known type, and provided in known manner with suction ports 2, is adapted to be pivoted into position adjacent the front roller of a drafting arrangement (see FIG. 3).

One end of an air conducting tube 4 is secured centrally of the suction tube 1, the other end being supported by a collar 5 disposed thereabout and having two parallel arms 6 pivotally mounted by means of pin 7 in a suitable support secured to the suction duct 8. The support may be in the form of a hollow bracket 9, said pin 7 extending from the sides thereof to form projections which engage the through holes in the ends of the arms 6 thereby to pivotally support the tube 4. .If required,

the arms 6 may be resilient in order that the hinged joint can easily be disconnected. The hollow bracket 9 is sealed to the suction duct 8 and the wall of the latter has provided therein an opening 10. The end of the tube 4 is flexibly connected to the hollow bracket 9, to the suction duct 8 or to the opening 10 therein by such as rubber sleeves or other appropriate means. This particular arrangement is such that the assembly formed by the suction tube 1 and the tube 4 may be pivoted about the pin 7 whilst maintaining sealing contact between the suction duct 8 and said tube 4. The motion of the tube 4 is in plane 11 (FIG. 2) so that the suction tube 1 will, over the full extent of pivotal motion, maintain a true parallel relationship with the front as indicated by the point marked 3, thus all the suction ports 2 will be equally spaced from the front roller. Such equal spacing will ensure that all the suction points will function equally well.

An important advantage of the arrangement above described lies in the fact that axial displacement of the suction tube 1 is impossible and, thus, the suction ports 2 will maintain a constant position relative to the yarn moving from the drafting rollers.

The extreme position of the suction tube, that is to say, the position illustrated in FIG. 1, may be determined by co-operating elements on the bracket 9 and the arms 6. For example, a spring-loaded latch 12 fixed to each of the arms 6 may engage corresponding notched rack arrangements associated with the bracket 9. In alternative arrangements, a tilting spring arrangement with adjustable end stops may be used, the adjustable end stops allowing of an alteration in extent of pivotal motion of the tube 4 and thus the spacing of the suction ports 2 from the front roller or from the pin running therefrom.

The suction duct 8 is, of course, the large suction duct, which usually runs for the whole length of the machine and is connected to an exhauster, a filter, or the like. Over the whole length of the machine, of course, several art.

of the groups comprising items 1, 4 and 9 etc. are arranged in a row.

With a little extra expenditure, it is possible to arrange for several arms which function .as part. 4 to radiate from the joint 6and7, and to enter the suction tube atan appropriate angle; this arrangement improves the uniformity of the suction. effect at all the suction openings. It may also be mentioned that the hollow bracket 9 can be connected to the wall of the suction duct via a sealing washer Orrubber washer 13, and then, of.course,.this sealing washermust be appropriately cut out in the middle. The

flexible air-conveying connectionbetween the swivelling arm 4 and the suction duct 8 may be so arranged that the connection isbetween the hollow bracket'9 'andthe pivoting arm 401' between the latter and the opening'ltlw.

FIGSJB and 4 show an alternative embodiment. Referring now to FIGS. 3 and 4, the. outside edge 21 of the suction tubel would, on pivotal motion in the tube '4 round theaxis7, carry out a movement corresponding to the curve 22; the edge 21, therefore, follows the curve "To overcome this difi'iculty, flthepivo'ting and not 'fixe'd,"'but isarranged so that it can be moved by fittinga sealing but flexible connection 25 between the suction duct "Son the one hand and'the end 4 of the pivoting tube 4; so that such a pivoting motion of the pivoting tube 4 is effected, that is to say, a motion in which .theedgejZl follqws the curve 26, .guidesare proyided,su'c h ,that upon pivoting tube 4 in'a downward direction, a displacement offthe' tube in ,the direction of the arrowfIValsooccurs,

' the resultant motion being such that the edge 21.0f the .suction tube 1 cannot, under any circumstances, touch the yarn 23 or interfere with it in anyway when the swivelling movement is carried out.

The principle is, therefore, to arrange the swivelling movement of, the pivoting tube 4 in such a way .thatthe .curve 26 remains outside the zone of theyarn 23. ,As an example of .such a means, it is suggested that fixed guide -slots 29- are provided onthebrackets 28 affixedto the suc ,tion duct-8, one on each side of the pivoting tube, said slots being curvediorstraight, but so. arranged that guide pegs 30 projecting from the pivoting tube .4and engaging the slots 29 move to the leftupon-downwa-rd movement-of the tube4 (see FIG. 3).

The invention is-not restricted to the particular features ,of .the embodiment hereinbefore described, since alternatives .willreadily present themselvesto one skilled in the For instance, similar results maybeobtained by kinematic methods, for example, combined guides or hinged levers, if necessary, also springs, and perhaps also .rubberparts, with suitable guiding of the pivoting tube 4, perhaps also by raising the pivoting. axis 7 ,to a-.higher.position, say, that shown by 7'.

We claim: 1. A suction device of particular, though not exclusive, application to ring'spinning frames including a suction tube constructed to have an axial passageway therein, a

rigid arm with its one end fixed substantially perpendicular to said suction tube, an axial passageway in said rigid arm communicating with said axial passageway in said suction t-ube,.a collar disposed about the remoteendof the rigid flexible sealing coupling between said remote end of the rigid arm and said aperture, the mountingof'the hollow arm upon the bracket allowing pivotal motion of the arm in a plane perpendicular to the axis of the suction tube.

2. A suction device as claimed in claim 1 including cooperating means on the arm and on the fixed support whereby the suction tube may be located in any one of a plurality of predetermined angular positions about the pivot of said rigid arm.

3. -A suction device for a plurality of threads all moving in substantially the same plane on a spinning frame comprising in combination, a hollow suction tube parallel to the plane of the threads and having a plurality of transverse apertures defined therein each of which communicates with the hollow interior of said tube and with said apertures beingv longitudinally spaced along said tubes so suction tube and having its hollow interior communicating with the hollow interior of said suction tube, a suction duct defining an aperture therein, substantially airtight flexible sealingmeans connecting said rigid tube at the end thereof which is remote from said suction tube with said aperture defined in said suction duct, and means mechanically coupledjbetween said rigid tube adjacent its said remote end ,and said duct and permitting rotation of said rigid tube only about an axis which is parallel to said suction tube, whereby rotation of said rigid tube causes said "suction tube to always remain parallel to the plane of a thread .4. -A suctionapparatusfor a plurality of threads all moving in substantially the same plane and parallel to each other on a spinning frame comprising in combination, ahollow suction tube parallel to the plane of and perpendicular to said threads and having a plurality of transverse apertures defined therein each of which communicates with the hollow interior of said tube and with saidvapertures being longitudinally spaced along said tube so that each lies opposite a respective one of the threads, at least one rigid hollow .tube connected transversely to said suction tube and having its hollow interior communicating with the hollow interior of said suction tube, a

suction duct. defining ,anaperture therein, substantially airtightfiexible sealing-means connecting said rigid tu e at the end thereof which-is .remotefrom said suction .tube .with saidraperture defined in said suction duct, and

,means mechanically coupled between said rigid tube ad- ,jacent' its said remote end and said duct and permitting rotation of. said rigid tube only about an axis which is parallel to said suction tube, whereby rotation of said rigid tube causes said, suction tube to always remain parallel to the plane of said threads and causes each aperture in-said suction tube to remain opposite a respective 5O ,meansincludes means for holding said rigid tube in a plurality of predetermined rotational positions.

6. The suctionapparatus of claim 4 wherein said sealing means is resilient and normally holds said remote end -of said rigid .tubeina predetermined position while still permitting rotationof said rigid tube about said coupling means.

v7.,The. combination as set forth in claim 3 wherein ,Said coupling means is connected to said rigid tube at a location adjacent its said remote end and is yieidable onlyinaplane perpendicularto said suction tube, said cation of a turningmoment to said rigid tube causing said suction-tube to move in a particular direction causes said coupling means to move in substantially the same directtion,.whereby upon application of a rotational force to said -rigidtube in a direction moving said suction tube away from'said threadsalso causes said rigid tube to be moved 8. The combination defined in claim 7 in which said coupling means comprises at least one bracket having a guide slot therein, and means projecting from said rigid tube being both slidable and rotatable in said guide slot.

9. The device of claim 3 in which said sealing means permits relative motion between said suction duct and said rigid tube, said coupling means also being yieldable in a direction away from said threads, whereby upon the application of a force to said rigid tube tending to rotate said suction tube away from said threads said rigid tube is also moved translationally away from said threads so that said suction tube clears the plane of said threads.

References Cited in the file of this patent UNITED STATES PATENTS Bechtler Sept. 12, 1950 Furstenberg July 22, 1958 Jacobi et al. Sept. 2, 1958 FOREIGN PATENTS France Dec. 16, 1953 Germany Feb. 10, 1955 

1. A SUCTION DEVICE OF PARTICULAR, THOUGH NOT EXCLUSIVE, APPLICATION TO RING SPINNING FRAMES INCLUDING A SUCTION TUBE CONSTRUCTED TO HAVE AN AXIAL PASSAGEWAY THEREIN, A RIGID ARM WITH ITS ONE END FIXED SUBSTANTIALLY PERPENDICULAR TO SAID SUCTION TUBE, AN AXIAL PASSAGEWAY IN SAID RIGID ARM COMMUNICATING WITH SAID AXIAL PASSAGEWAY IN SAID SUCTION TUBE, A COLLAR DISPOSED ABOUT THE REMOTE END OF THE RIGID ARM, A PAIR SUBSTANTIALLY PARALLEL ARMS RIGIDLY SECURED AT ONE END TO SAID COLLAR AND AT THE OTHER HAVING THROUGH HOLES THEREIN, A SUCTION DUCT DEFINING AN APERTURE THEREIN, A BRACKET ATTACHED TO SAID SUCTION DUCT AND SURROUNDING SAID APERTURE THEREIN, A PAIR OF HINGE PINS PROJECTING FROM SAID BRACKET FOR ENGAGEMENT OF SAID THROUGH HOLES, AND A FLEXIBLE SEALING COUPLING BETWEEN SAID REMOTE END OF THE RIGID ARM AND SAID APERTURE, THE MOUNTING OF THE HOLLOW ARM UPON THE BRACKET ALLOWING PIVOTAL MOTION OF THE ARM IN A PLANE PERPENDICULAR TO THE AXIS OF THE SUCTION TUBE. 